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Finding the Fourth Proportional to 223,704.36, 308,725.32 and 128,217.19

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Solution

The fourth proportional to 223,704.36, 308,725.32 and 128,217.19 is: 176,947.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,704.36 : 308,725.32 = 128,217.19 : x
  2. Step 2: Convert to fraction form
    223,704.36/308,725.32 = 128,217.19/x
  3. Step 3: Cross multiply
    223,704.36x = 308,725.32 × 128,217.19
  4. Step 4: Simplify right side
    223,704.36x = 39,583,893,012.25
  5. Step 5: Solve for x
    x = 39,583,893,012.25/223,704.36
  6. Step 6: Final answer
    x = 176,947.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.